"To be here in my birth country, to have my family come, being here with my sister and sharing this journey with her," she added. "It's incredible."

In 1993, South Korea-born Marissa Brandt was adopted by Minnesota couple Greg and Robin Brandt when she was just four months old. Just before she was set to arrive in the U.S., the couple also found out that they were pregnant with Hannah.

Six months after Marissa Brandt arrived in the U.S., her sister was born.

Ice hockey players Marissa Brandt who will play for South Korea in the coming Winter Olympic Games in Pyeongchang, and her sister Hannah Brandt who will play for the USA team, pose at Florida Hospital Center Ice in Wesley Chapel, Fla. in October 2017.

Hannah Brandt added that their parents are "ecstatic" to be able to watch both daughters compete in the Olympics and to be able to visit the place where Marissa was born.

"It’s a really special place to be, for all of my family, obviously, and to be able to kind of do this whole experience with them here, I couldn’t ask for any more," Hannah Brandt said.

"I always talked about doing a sister trip with my sister and coming here," she added. "Now it's kind of finally happening, and I couldn’t be more excited."

Marissa Brandt called it "an honor to be able to represent my birth country."

Greg Brandt/Handout via Reuters

Hannah Brandt, right, and her sister Marissa are pictured together in this undated family photo in St. Paul, Minn.

"I never thought that this would happen, and I never thought I'd be back here under these circumstances," she added. "I just hope to make Korea proud."

In addition, Marissa Brandt said "it means a lot" to her for her parents to be able to visit her birth country.

Marissa Brandt's team this year also includes 12 players from North Korea, whom she described as "awesome."

Brendan Smialowski/AFP/Getty Images

Hannah Brandt walks with her sister Marissa Brandt at the Gangneung Olympic Village before the Pyeongchang 2018 Winter Olympic Games, Feb. 6, 2018, in Gangneung, South Korea.

"They're eager to learn, they're disciplined, have a great attitude," she added of her North Korean teammates. "We couldn't have asked for a better group of girls."

She added that they have been heavily supervised, "but it's not like it throws off their game or anything like that."

Despite competing for different nations, Marissa Brandt said she and her sister "try and see each other every day."

If Team USA and Team Korea end up facing off, however, both sisters immediately said they would not take it easy on each other on the ice.